Screw driver and drill machine



Dec. 1o, v1929. H. c. BRANDT 1,738,687

SCREW DRIVER AND DRILL MACHINE Mia, m-

uul l Dec. 10, 1929. l H, C, BRANDT 1,738,687

SCREW DRIVER AND DRILL MACHINE Filed Aug. 2s, 192e z. sheets-sheet 2 aus Patented Dec. 19, 1929 staart er1 yHENRY C. BRANDT, OF ST. PAUL, `IWINNIEISOT'A scRnw naiven AND DRILL MACHINE Application filed August 23, 1928.

rl`his invention relates to a machine for operating upon-articles having part-s attached by screws. While vthe machine is applicable to various kinds of devices, itparticularly is designed and adapted to work on the ends of pump cylinders such as used in sprayers comprising an air pump. The device operated upon has a metal lcylinder with a flanged wooden plug closing the end thereof, which is lo held in place by screws passing through the metal into said plug. It has been the practice heretofore to drill the holes in opposite sides of the cylinder and plug successively, and then to insert'screws therethrough by hand.

It is an object of this invention, therefore, to provide a machine by means of which the plugs can be secured in the cylinders with great rapidity, ease and accuracy.

It is a further object -of the inveniton to provide a machine comprising means simultaneously drilling opposite sides of a cylinder and plug and having means for simultaneously inserting screwsin opposite sides of the cylinder and plug.

1t is more specifically an object ofthe invention to provide a machine comprising vertically alined means for respectively drilling opposite sidesofa cylinder and plug and insert-ing screws in opposite sides of the cylinder and plug with vertically alined means for holding the cylinder and plug in relation to said first mentioned means, which last mentioned means may be a commonand verticallyl movable means. 'These and other objects and advantages of Y the invention will be fully set forth in the following description made in connection with theaccoinpanying drawings, in which likereference characters refer to similar par-ts throughout the several views and in which Fig. lis a view in side elevation of the machine;

Fig. 2 is a plan view of the machine;

Fig. 3 is a view in front elevationof the machine; V

Fig. 4 is a horizontal section taken on line 4-4 of Fig. 3;

Fig. 5 is a horizontal section on the line 50 5-5of Fig. 3;

Serial No. 301,588.

Fig. 6 is a vertical section on. line '6 6 of Fig. 4; and

Fig. 7 is a partial view similar to Fig. 3, showing a modification.

Referring to the drawings, a machine is shown comprising a frame having the rectangular portions 10 spaced vertically thereof, and the'leg forming corner posts 11. Said frame also includes a transverse plate 12 eX- tending across the upper frame 10. and the bar 13 extending across and between the front posts 11. rlhe plate 12 has pairs of bearing brackets 14 secured adjacent either end thereof, having upper bearings 14a andlower bearings 14".

Journaled in the lower 'bearings 14b of thebars respectively are shafts 15 having drill chucks 16 disposed and secured 'therein at their front ends, adapted to removably vhold the drill members 17. Driving pulleys 18 are secured to the shafts 15 betweenthe brackets 14. The lshafts have thereon slidable collarsv19 forming part of a ball c thrust bearing, the other part of which is formed by collars 19a which collarsv are grooved to receive a split washer 2O fitted in` the groove in shaft 15, balls 21 being disposed between and in races formed in collars 19 and 1.192. Springs 22 are disposed between the collars 19 and washers 23, vengaging the-outer side of the outer bearing 14h, said springs thus holding shafts 15 outwardly. Bell crank levers 24 have cylindrical blocks 24a at the inner sides of their upper ends, engaging the outer ends of shafts 15, said levers 24 being pivoted on brackets 25 secured to lthe outer brackets 14 and said levers have link rods 26 secured. to their lower arms which extend downwardly and are secured to the sides of a pedal lever 27 having side portions pivoted atvtheir inner ends to a rod 28 secured in brackets 28a upstanding from and secured to the lower frame 10. The pedal lever 27 has a front portion extending across the front of the frame to which an angular pedal 29 is secured. The pedal lever 27 has secured thereto the lower end of a tensile spring 30, the upper end of which is secured to a screw 31 in one of the front posts 11. A bar 32 eX- tends between the inner brackets 14 immediately below the inner bearings 14b being se- Vformed in collars and 40a.

cured to angle members 33 secured to said bracket and said bar carries a bracket 34 particularly formed to support the end of a pump cylinder' 35 operated upon with Vits plug 36.

The upper bearings 14 have journaled in the pairs thereof respectively, shafts 37. Said shafts have secured thereto between the bearings 14, the pulleys 38. The shafts 37 have threaded sockets in their inner ends adapted to receive the screw driving members 39.

Said shafts also have at their outer 'ends slotted collars 40 forming part of the thrustbearing, comprising also collars 4()EL on shaft 37 grooved to receive a split washer 41 disposed in the groove 37*1 of said shaft, balls 42 being disposed between and in recesses Compression coil springs 43 are disposed between collars 40'and washers 44 engaging the outer side of the outer bearings 14a. rlhe inner bearings 14a have secured thereto a holder 45 comprisinga pair of similarly formed brackets havingv a recess 45a therein adjacent their forward ends, from which leads a tapered opening 45b in axial alinement with shafts 37.` The recess 45a also has an opening 45c leading from the rear thereof, in axial alinement with 'shaft 37 through which member 39'is adapted to pass. The members 45 are secured to bearings 14a by screws 46 passing through slots in the arms of the member '45 which are overlaid by resilient plates 47.

` Bell crank levers 48 are pivoted to .brackets 49v secured to the outer upper sides of the outerbrackets 14 and have at their upperV ends cylindrical blocks 48n engaging the outer ends of shaftsY 37. The lower inner ends of leve-rs 48 have connected thereto the link bars 50 which extend downward and are adjustably connected at their lower ends, by the members 5,8, which bar Acarried a supporting f plate 59 particularly adapted to hold the cylinder 35 and plug 36. It will be seen that the brackets 34 and'59 have spaced inwardly projecting arms 34a and 59a respectively,

which have their ends upturned to form abutplaced.

ments against which the end of plug 36 is Said brackets also have their upper central portions formed as a trough for receiving the cylinder 35. Said plug 36 is shown as having the pump rod .36fL extending centrally therethrough, a portion of the handle 36b also being shown. The pedal le- A bar 57 extendsk ifreaee? vers 27 and 53 are limited intheir upward movement respectively by stop members 60 and 6l respectively comprising bars secured to the front portion of the front posts 11. A hopper 62 is disposed between the inner bearings 14a and secured thereto by brackets 63 at each side of said hopper.

Brackets 64 are secured to the sides of the top frame 10 adjacent the rear thereof, having bearings in which is journaled a shaft 65. Said shaft has a pair of similar pulleys 66 thereon, alined with the pulleys 18, belts running over said pulleys and pulleys 18, one of said beltsbeing a crossed belt. Said shaft also yhas thereon outward of the pulleys 66y another pair of pulleys 68 alined with the pulleys 38, belts 69 runningy over pulleys 38 and 68, one of which belts is also a crossedv belt. Ay rod 70 in the form of a headed and nutted bolt extends through the top bosses 64a of bracket 64, thus securing said brackets together, said rod being partly broken away in Fig. 2. Bar 71 extends across lthe rearward part of lower frame 10 tok form a supporting means for a motor 72 shown as of the electrical type. Said motor has a driving pulley 73 thereon, over which runs a belt 74 also running over the pulley `75 secured to shaft for driving the lat-ter. i

In operation the parts of the machine will normally vappear as shown in VVFigsplto 3. Springs 30 and 55 `will elevate the pedal levers 27 and 53 and the springs 22 and 43 will move the shafts 15 and 37 outwardly.

Said shafts will be driven through' belts 67l and 69 from' the shaft 65 which will in turn be driven by belt 74 from the motor 72. The

operator now takes one of the cylinders 35 with the plug 36 therein and Vplaces the same on the support 34 so thatV a portion of plug 36. within the cylinder is centrally alined with the axis of the drills-17. now presses on the pedal 29, depressing pedal lever 27 and the link rods 26 so that the shafts 15 are moved inwardlyby lever 25, springs 22 being compressed. The drills 17 are then moved inwardly and drill holes through the The operator sides of the cylinder and into the plug 36. K i

The cylinder 36 and plug 35 are then placed il on support 59, which'support is similar to support 34 and is arranged in the same relation to the members 39 as support 34 is arranged to the drill 17. Theoperator now places the screw in the recesses'45a of each of the brackets 45 in the posit-ion illustrated in Fig. 4. He thenpress'e's on't-heftreadle 54, depressing pedal lever 53 and link bars 50. Levers 48 are swung and move the shafts 37 inwardly. The screw .39a is engaged by the tang on the end of member 39 and the screw is forced through the opening45b into the holes drilled in the cylinder 35 and plug 36 and screwed into place Vby the rotation of members 39. The screws are thus firmly applied and the portions and 36 secured togetlier.

parts. 'The support members 32, 33 and 34,

and 57, 58 and 59 are omitted and a support 7G is used, similar to the .supports 34. and

, 59, which is carried at the upper end of the vertical siidiiig member 77 sliding in guides 1()a formed in the front upper frame 10. r.lie member 77 has an elongated slot 77a therein through which passes the spaced headed screws 78 secured in the frame 10.

, Said slide is pivotally connected at its bottom by a pivot 78 to a lever 80, said lever having an elongated slot 80a through which said pivot 7 8 extends.- A pedal bar 81 depends from the outer end of lever 80, having a handle 811 at its lower end.

In the operation ofthe structure shown in Fig. 7, the slide 77 normally will be at its lowest position with the top of the slot 77a against the upper bolt 7 8. The cylinder 35 and plug 36 will be placed in the bracket 76 and in the lower position of slide 77, this will bring the sides of plug 36 substantially centrally alined with the drill 17. The operator now presses on pedal 29 as before described and drills 17 are moved inwardly drilling the holes in the cylinder and plug. The operator then pressesdownwardly on handle 81 and can in the meantime hold the cylinder and plug in the bracket 76 if desired, with his left hand. The slide 77 is moved upwardly until the lower part of the slide 77 engages the lower bolt 78, at which time the axes of the holes drilled in the cylinder 35 and plug 36 are in alinement with the aXes of members 39. Screws are placed in the member 45 and the operator then presses on pedal 54 and members 39 are moved inwardly, turning the screws into place in members 35 and 36 and securing the same together. rlhe operation of placing the screws is thus quickly and easily accomplished.

From the above description it is seen that applicant has provided a simple and efiicient machine by which the two members are secured together in firm and accurate condition and the operation y is completed with great rapidity. Not only is the operation performed much more rapidly than was previously done by hand, but the Work is more accurate and uniform. The parts of the machine are comparatively few and the same is easily maintained asv-well as being easy and rapid in operation. The device has been amply demonstrated in actual practice and found to be very successful and eiicient.

It will, of course, be understood that various changes may be made in the form, details, arrangement and proportions of the parts, without departing from the scope of applicants invention, which, generally stated', consists in a device capable of carrying. out the objects above set forth, in the novel parts and combinations of parts disclosedy and1 defined in the appendedy claims.

y What is claimed is 1. A machine .for securing two parts of a device together withV screws, having in combination, a frame, means for drilling a hole l supported on said frame, means for driving a screw into said hole by a rotative action supported on said frame, and a supporting means for said device relatively to which said drilling means and second mentioned means bear a similar relation, and` means fory moving said drilling means and second mentioned means.l successively towards said supporting means to first drill, and then apply a screwto Y said` device. f

2. A machine for secu-ringtwo partsgof a device together with screws, having in comibination, a frame, oppositely'disposed drilling means supported on said frame, oppositely disposed screw applying means supported on said frame, and supporting means for `holding the said device" relativelyr to which said drilling4 'means and` screw applying meansbearasimilar relation, and means for moving said drilling meansand screw applying means towards said,v supporting means successively, to viirst drill holes lini the opposite sides vof said device and' then apply screws in said holes. v i I 3., A machine for securing two parts of a device together with screws, having in combination, a frame, oppositely disposed drilling `meansmounted in'said frame, oppositely disposed screw applying means mounted in said'frame, means for driving said drilling and screw applying means from; al common shaft journaled in said'frame,fa motor on said frame vfor rotating said shaft, andsupfporting means for said device for holding the same in similar relation to said drilling meansand screw applying means, and means for successively moving said drilling means and screw applying means towards said support toirst drill said device andV thenapply thescrews thereto. Y

4i. A machine forl securing two 'parts of a device together with screws, having in combination, a frame,oppositely disposed drill-4 ing means mounted insaid frame, oppositely disposed; screwv applying means mounted in said frame, said means being mounted with their axes in thefjsame vertical plane, supporting means for holding said device in a similar relation to said drillingand screw applying means, and means for successively moving said drilling means and screw applying means towardsy said support for irstdrilling and then applying "screws to said device.

A machine for securing two parts ofv a device together with screws, h'avingf'in combination, a` frame, oppositely disposed drilling meansmounted in said frame, oppositely ,disy posed screwapplying means mounted in said frame, and a support for said device movable torone position with said device alined with said drilling means for drilling holes in said device, and -movable to another position With said holes axially alined with said screw app lying means for applying screws to said desaiddevice adapted to hold the same in similar relation to said drilling means and screw applying device, and pedal operated means for moving said drilling means towards said supporting means to drill said device, andpedal means for moving said screw applying device y towards said supporting means for applying screws to vsaiddeviceAY inthe holes drilled by saiddrilling means;`

comprises holding said parts in-one position, simultaneously drilling a plurality of holes through the outer part and into the inner part thereof from opposite sides, moving the parts vertically to another position in the same relation and simultaneously applying screws to said parts in said holes. i'

10. A machine for securing two parts of a device together with screws, having in comp bination, a frame, a supportfor said'device, a member at each oftwo opposite sides of said support adapted to receive and guide a screw, rotative means for entering each of said members and engaging a screw therein to push the same from said members and rotate the screw and drive the same into said device and means for moving said last metioned means to engage the screw in each of said members and simultaneously. rotate and drive thesame into said device. f

, In testimony whereof I atliX my signature.

ENRY o. BRANDT.

1 7. "Avmachinefor' securing two parts of a .l

device .together with* screws, havingV in combination, a frame, shafts journaled in `the upper bearings of each pair ofsaid brackets respectively, lhaving drill receiving and holding means; at their inner ends, springs for holding said shafts to their outer positions, levers for fmoving Vsaid shafts inward, and

pedal operated l, means for simultaneously swingingsaid levers anvd. moving said shafts inwards, shaftsfmounted .inthe upper bearings'fof said brackets respectively, vscrew applying means carried in the inner ends of said last mentioned shafts, springs for holding said vlast mentioned shafts in their outer positions', levers engaging the outer ends of said shafts for moving the same inwardly, pedal i means for simultaneously swinging said last mentioned levers to move said Vscrew applying device and shafts inwardly, and supporting means" for holding said. device in alinement L with said :first mentioned shafts `and drilling means for drilling holes in saiddevice and for holding said device with said holes alined with said screw applying devicey for applying screws therein. Y Y

`8. The method of securing together two parts, one of which surrounds the other, which comprises holding said parts in one position, simultaneous-ly drilling a plurality of holes through the outer part andinto the inner part, movingfthe parts to another position in the lsame relation andsimultaneously applying screws to said parts in said holes. 9. The method of securingtogether two parts,`one of which surrounds the other, which 

